Commit e126e5592d

@@ -1,100 +0,0 @@
-const std = @import("std");
-
-// zig fmt: off
-pub const Register = enum(u8) {
-    // 0 through 7, 32-bit registers. id is int value
-    eax, ecx, edx, ebx, esp, ebp, esi, edi,
-
-    // 8-15, 16-bit registers. id is int value - 8.
-    ax, cx, dx, bx, sp, bp, si, di,
-
-    // 16-23, 8-bit registers. id is int value - 16.
-    al, cl, dl, bl, ah, ch, dh, bh,
-
-    /// Returns the bit-width of the register.
-    pub fn size(self: Register) u7 {
-        return switch (@intFromEnum(self)) {
-            0...7 => 32,
-            8...15 => 16,
-            16...23 => 8,
-            else => unreachable,
-        };
-    }
-
-    /// Returns the register's id. This is used in practically every opcode the
-    /// x86 has. It is embedded in some instructions, such as the `B8 +rd` move
-    /// instruction, and is used in the R/M byte.
-    pub fn id(self: Register) u3 {
-        return @truncate(@intFromEnum(self));
-    }
-
-    /// Convert from any register to its 32 bit alias.
-    pub fn to32(self: Register) Register {
-        return @enumFromInt(@as(u8, self.id()));
-    }
-
-    /// Convert from any register to its 16 bit alias.
-    pub fn to16(self: Register) Register {
-        return @enumFromInt(@as(u8, self.id()) + 8);
-    }
-
-    /// Convert from any register to its 8 bit alias.
-    pub fn to8(self: Register) Register {
-        return @enumFromInt(@as(u8, self.id()) + 16);
-    }
-
-    pub fn dwarfNum(reg: Register) u8 {
-        return @intFromEnum(reg.to32());
-    }
-};
-
-// zig fmt: on
-
-/// TODO this set is actually a set of caller-saved registers.
-pub const callee_preserved_regs = [_]Register{ .eax, .ecx, .edx, .esi, .edi };
-
-// TODO add these to Register enum and corresponding dwarfNum
-//  // Return Address register. This is stored in `0(%esp, "")` and is not a physical register.
-//  RA = (8, "RA"),
-//
-//  ST0 = (11, "st0"),
-//  ST1 = (12, "st1"),
-//  ST2 = (13, "st2"),
-//  ST3 = (14, "st3"),
-//  ST4 = (15, "st4"),
-//  ST5 = (16, "st5"),
-//  ST6 = (17, "st6"),
-//  ST7 = (18, "st7"),
-//
-//  XMM0 = (21, "xmm0"),
-//  XMM1 = (22, "xmm1"),
-//  XMM2 = (23, "xmm2"),
-//  XMM3 = (24, "xmm3"),
-//  XMM4 = (25, "xmm4"),
-//  XMM5 = (26, "xmm5"),
-//  XMM6 = (27, "xmm6"),
-//  XMM7 = (28, "xmm7"),
-//
-//  MM0 = (29, "mm0"),
-//  MM1 = (30, "mm1"),
-//  MM2 = (31, "mm2"),
-//  MM3 = (32, "mm3"),
-//  MM4 = (33, "mm4"),
-//  MM5 = (34, "mm5"),
-//  MM6 = (35, "mm6"),
-//  MM7 = (36, "mm7"),
-//
-//  MXCSR = (39, "mxcsr"),
-//
-//  ES = (40, "es"),
-//  CS = (41, "cs"),
-//  SS = (42, "ss"),
-//  DS = (43, "ds"),
-//  FS = (44, "fs"),
-//  GS = (45, "gs"),
-//
-//  TR = (48, "tr"),
-//  LDTR = (49, "ldtr"),
-//
-//  FS_BASE = (93, "fs.base"),
-//  GS_BASE = (94, "gs.base"),